Copyright © University of Cambridge. All rights reserved.
In FF7 you looked at the following procedures and were invited to alter them at your leisure:
TO POLY :N
REPEAT :N [FD 45 RT 360/:N]
TO POLY :N :M
REPEAT :N [FD :M RT 360/:N]
Consider REPEAT 5 [ FD 100 RT 144] .........what do you think this means? Try to imagine what is happening before entering the procedure into a machine. Imagine being the 'turtle' that creates the graphic....how many times does it turn? Through how many degrees has it turned when it has finished the procedure?
Consider the procedure below. What do you think is happening? Talk through with your friends what you think the procedure is all about. Only then enter it into a machine and experiment with it.
TO GAZE :M :N
REPEAT :N [ FD :M LT 720/:N]
Try GAZE 100 5;
GAZE 120 7;
GAZE 200 9;
GAZE 50 8 (Beware maybe not what you think!)
Okay then what about GAZE 150 12?
GAZE 250 16?
|Alternatively, you might like to write a procedure for any of these shapes. Walk them first - either in your mind or in the playground.|